Currently, the selling rate for Pandora's Planetary Market is stuck at just 25% efficiency, meaning it is almost never worth selling resources on the market. Purchasing resources, however, is fine, since it sits at a full 100% efficiency. It would make the game more interesting if the selling rate was increased to at least 50% - in fact, I would prefer to see it changed to the full 100% rate same as buying such that market values were directly related to how the other players were using the market. This simple change would open the door to real stock speculation in Pandora, which should be a lot of fun.